I thought about this a lot.
I refrained from replying so far because I attributed a lot of meanings of Mars in Gemini to either my Sun in Libra, Moon in Scorpio and/or some of my angular planets.
After each sentence I will try to comment:
1.Curious, inquiring, bright (even piercing); forthright, decisive, strong opinions (opinionated). All of this very much so. I am not sure about bright however I chew on stuff a lot until an opinion is formed and I stick with that. I then remain quite convinced and won't change my conclusions very often. My collegues and some friends have told me I have a piercing mind.
2.Naturally polemical, argumentative (esp. the sense of engaging debate, stirring conversation on a topic). (Some have razor tongues.) [STATS: not charming] Yes, engaging debate and stirring conversation on a topic is what I really need to do if I need to make a point. There can be a strong urge. I am better in person doing this then on paper. Eloquent and peaceful, that is always my goal. On paper I express things more in a poetical way for the art of it and to soften things up to not sound too sharp.
3.Pragmatic rather than idealistic. [STATS: not idealist] I consider myself both. Perhaps this is due to strong Neptune.
4.Scientific mind hones facts. Irrepressible curiosity, can commit mind to research; methodical. Several work in the sciences (or at least train in science). I love facts and I can study endlessly and never get bored. Going through the same stuff again and again. Because as a Libra I forget things easily and need to relearn. That's what I do step by step, methodically. I really like to get to the heart of things and find truth. Finding truth has always been important and relaxing, how strange this may sound. When a subject interests me I like to read as much as I can about different point of views.
5.Feels strength from being heard; otherwise, over-compensates. (Many "know better than anyone else," need to be proven right, eager for their ideas to receive official sanction.) Feels strength from being heard, yes, absolutely but knowing better than anyone else is something I do not relate to. I can have strong opinions and when I feel that I am right I do not feel better then others. Often the contrary.
6.Among female musical celebrities, a remarkable pattern of power (Barbra Streisand, Diana Ross, Dolly Parton, Patsy Cline).
7.Many public examples are eloquent, often with piercing minds (in politics, business, science; not a profession-specific trait).
8.Substance abuse (other post-abuse behavior), especially alcoholism. Yes, I am vulnerable to addiction. I went from one addiction to another. Quit heavy smoking since 10 years and am careful with drinking so that it doesn't become an issue.